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Implement SAML authentication for GL3 #5476

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Ithanil
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@Ithanil Ithanil commented Oct 20, 2023

This PR enables SAML authentication for GL3 and is based on similar PRs for GL2: #1334 and #2270 . We are using this feature in production, but it was not developed with the goal to be merged upstream. Because SAML for GL2 was never merged, I guess it won't happen for GL3 as well. However, I'd like to provide our development to the public for anyone in need of this.

This is the part of a series of similar PR submissions (Redis Sentinel, SAML integration, LDAP integration).

Details / How to use:

  • SAML is added analogous to OIDC via omniauth
  • OIDC takes precedence, so configure any OIDC variables if you want to use SAML
  • Documention on configuration is provided in sample.env and SAMLConfiguration.md
  • Notably, some configuration may be obtained from IDP metadata, especially SAML_IDP_URL, SAML_IDP_CERT_FINGERPRINT and the SAML_NAME_IDENTIFIER, so try to not configure these manually if possible
  • The PR also removes any Sign-Up buttons if external authentication is used

@farhatahmad
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Thanks for these PR's - I will definitely keep these open and will mark them as approved by maintainers for others who are interested in deploying these

@Ithanil
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Ithanil commented Oct 23, 2023

@farhatahmad Thank you, that's great.

FYI: I have made another PR #5480 , which is a subset of this one here. It is designed to be easily mergeable and lessen the burden of maintaining custom provider extensions. Please let me know your thoughts on that one.

Ithanil

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# Re-write LDAP and Google to greenlight
user_hash[:provider] = %w[greenlight ldap google openid_connect].include?(user_hash[:provider]) ? 'greenlight' : user_hash[:provider]
# Re-write list of providers to greenlight
user_hash[:provider] = %w[greenlight ldap google openid_connect saml].include?(user_hash[:provider]) ? 'greenlight' : user_hash[:provider]
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Now that SAML is in this list, the V2 migration task should work without modification. Beforehand I had a modification in place which did match the provider to greenlight already in the migration task.

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sonarcloud bot commented Nov 15, 2023

Kudos, SonarCloud Quality Gate passed!    Quality Gate passed

Bug A 0 Bugs
Vulnerability A 0 Vulnerabilities
Security Hotspot A 0 Security Hotspots
Code Smell A 1 Code Smell

No Coverage information No Coverage information
0.0% 0.0% Duplication

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sonarcloud bot commented Dec 21, 2023

Quality Gate Passed Quality Gate passed

The SonarCloud Quality Gate passed, but some issues were introduced.

1 New issue
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

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sonarcloud bot commented Mar 12, 2024

Quality Gate Passed Quality Gate passed

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0.0% Duplication on New Code

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sonarcloud bot commented Apr 22, 2024

Quality Gate Passed Quality Gate passed

Issues
1 New issue
0 Accepted issues

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No data about Coverage
0.0% Duplication on New Code

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hex-m commented Sep 19, 2024

Common vulnerability with ruby projects implementing SAML: https://ssoready.com/blog/engineering/ruby-saml-pwned-by-xml-signature-wrapping-attacks/

(Not a dev - can't say if this implementation is affected)

@Ithanil
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Ithanil commented Sep 19, 2024

Common vulnerability with ruby projects implementing SAML: https://ssoready.com/blog/engineering/ruby-saml-pwned-by-xml-signature-wrapping-attacks/

(Not a dev - can't say if this implementation is affected)

Many thanks for the heads-up. Indeed, it appears as if this PR is implementation is affected. I will update the branch later, bumping omniauth-saml to 2.2.1 and ruby-saml to 1.17.0.

EDIT: Fixed by 8eb2638

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3 participants